US4818675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic light sensitive material with improved silver blackness of picture image
Assignee: Fujifilm Holdings Corp
•
Filing: 1986-06-11
•
Granted: 1989-04-04
•
Expires: 2006-06-11
Abstract
Abstract This invention provides a silver halide photographic light sensitive material having an improved blackness of image silver, as well as high sensitivity and covering power. The present silver halide photographic light sensitive material includes at least one layer of a silver halide photographic emulsion on at least one side of a support, characterized in that said layer of silver halide photographic emulsion contains fine silver halide grains, or tabular silver halide grains having a grain thickness of 0.4μ or less, and a dye having a maximum absorption wave length of 520 to 580 nm is contained in said layer of silver halide photographic emulsion and/or another layer such that the transmission density of green light is 0.03 or less after the developing treatment of the photographic light sensitive material.
Inventors
- 👤 Nobuaki Miyasaka
- 👤 Hideo Ikeda
- 👤 Minoru Sakai
- 👤 Shigeru Ohno
- 👤 Yasuo Mukunoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:45
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
101 words
A silver halide photographic material having at least one layer of a silver halide photographic emulsion on at least one side of a support, wherein said layer of silver halide photographic emulsion contains fine silver halide grains, or tabular silver halide grains having a grain thickness of 0.4μ or less, and wherein a dye having a maximum absorption wave length of 520 to 580 nm is contained in said layer of silver halide photographic emulsion and/or another layer in an amount such that the transmission density of green light is 0.01 to 0.03 after the developing treatment of the photographic material.
Claim 2
Dependent Claim
101 words
A silver halide photographic material having at least one layer of a silver halide photographic emulsion on at least one side of a support, wherein said layer of silver halide photographic emulsion contains fine silver halide grains, or tabular silver halide grains having a grain thickness of 0.4μ or less, and wherein a dye having a maximum absorption wave length of 520 to 580 nm is contained in said layer of silver halide photographic emulsion and/or another layer in an amount such that the transmission density of green light is 0.01 to 0.03 after the developing treatment of the photographic material.
Claim 3
Dependent Claim
25 words
A silver halide photographic light sensitive material according to claim 1, wherein said dye has a maximum absorption wave length of 530 to 570 nm.
Claim 4
Dependent Claim
25 words
A silver halide photographic light sensitive material according to claim 2, wherein said dye has a maximum absorption wave length of 540 to 560 nm.
Claim 5
Dependent Claim
40 words
A silver halide photographic light sensitive material according to claim 1, wherein said dye is selected from the group consisting of an anthraquinone dye, an azo dye, an azomethine dye, an oxonol dye, a carbocyanine dye, and a styryl dye.
Claim 6
Dependent Claim
22 words
A silver halide photographic light sensitive material according to claim 1, wherein said dye is added to a photographic light sensitive emulsion.
Claim 7
Dependent Claim
21 words
A silver halide photographic light sensitive material according to claim 1, wherein said dye is added to a hydrophilic colloid layer.
Claim 8
Dependent Claim
20 words
A silver halide photographic light sensitive material according to claim 6, wherein said hydrophilic colloid layer is a protective layer.
Claim 9
Dependent Claim
42 words
A silver halide photographic light sensitive material according to claim 1, wherein said dye is contained in said layer in such an amount that the transmission density of green light is 0.01 to 0.02 after the developing treatment of the photographic material.
Claim 10
Dependent Claim
26 words
A silver halide photograpic light sensitive material according to claim 1, wherein the average grain size of said fine silver halide grains is 0.4μ or less.
Claim 11
Dependent Claim
26 words
A silver halide photographic light sensitive material according to claim 9, wherein the average grain size of said fine silver halide grains is 0.3μ or less.
Claim 12
Dependent Claim
24 words
A silver halide photographic light sensitive material according to claim 1, wherein the thickness of said tabular silver halide grains is 0.3μ or less.
Claim 13
Dependent Claim
20 words
A silver halide photographic light sensitive material according to claim 1, wherein said fine silver halide grains are internally fogged.
Claim 14
Dependent Claim
31 words
A silver halide photographic light sensitive material according to claim 12, wherein said internally fogged fine silver halide grains are used in combination with a light sensitive iodine content-light sensitive material.
Claim 15
Dependent Claim
24 words
A silver halide photographic light sensitive material according to claim 1, wherein the diameter of said tabular silver halide grains is 0.5 to 10μ.
Claim 16
Dependent Claim
27 words
A silver halide photographic light sensitive material acccording to claim 1, wherein the average diameter/average thickness ratio of said tabular silver halide grains is 5 to 50.
References Cited (Backward Citations)
US2996382A
Cited
US3178282A
Cited
US3397987A
Cited
US3607278A
Cited
GB1426277A
Cited
US4414306A
Cited
JPS58108526A
Cited
US4434226A
Cited
US4435501A
Cited
US4439520A
Cited
US4425426A
Cited
US4425426B1
Cited
US4628021A
Cited
JPS60158436A
Cited
DE3526670A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |